scientific article

zbMath1025.11006MaRDI QIDQ2704199

Detlev W. Hoffmann

Publication date: 2 December 2003

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

survey\(u\)-invariantisotropylengthPythagoras numberHasse numberquadratic forms over fieldslevelconstruction of fields with prescribed invariantsmethod of Merkurjev

Mathematics Subject Classification ID

Sums of squares and representations by other particular quadratic forms (11E25) Quadratic forms over general fields (11E04) Algebraic theory of quadratic forms; Witt groups and rings (11E81) Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) (12D15) Research exposition (monographs, survey articles) pertaining to number theory (11-02) Forms over real fields (11E10)

Related Items (8)

Generalised quadratic forms and the \(u\)-invariant ⋮ Sums of values represented by a quadratic form ⋮ Totally positive extensions and weakly isotropic forms ⋮ Decomposable quadratic forms and involutions ⋮ Quadratic Forms ⋮ Sums of squares in function fields of hyperelliptic curves ⋮ Some criteria for stably birational equivalence of quadratic forms ⋮ Minimal weakly isotropic forms

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